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Mountain Lion + 8800 GT (black screen)


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#41
Peter_sm

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Actually that might have been a thread I am on. I had to remove the NV stuff in my DSDT also in order to get my graphics back.


Can you check my DSDT if there is something that can be removed from my DSDT, see some post above with my attached file.

BR

Peter

#42
stellarola

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EVGA and I believe I flashed it with the Mac Pro's 8800GT bios some years ago. I have an XFX Alpha Dog Edition as well that I haven't tried yet. It may be possible to fix this issue by loading my EVGA's nvidia rom from Chameleon. I'll let you know when I extract the bios, etc.

EDIT: Grab Nvidia 8800GT roms from the first post on this thread: http://www.insanelym...dpost&p=1053726

It's the mediafire link.

Try to load either one of those roms using Chameleon, and remember to use stock kexts.

#43
blade007

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Hold the phone. My 8800GT works in 10.8 flawlessly. OP, which brand 8800GT do you own?

-Stell


Mines a Inno3D 8800GT

#44
bigpoppa206

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Her is my DSDT

I saw in other thread, that s´they remove other graphic related kext, except NV, perhaps that is a way to try....

//Peter


Ok, you STILL have your graphics edit in there for the 8800GT under Device (PEGP).

			   Device (PEGP)
				{
					Name (_ADR, 0xFFFF)
					Name (_PRW, Package (0x02)
					{
						0x09,
						0x04
					})
					Method (_DSM, 4, NotSerialized)
					{
						Store (Package (0x34)
							{
								"AAPL,HasPanel",
								Buffer (0x04)
								{
									 0x01, 0x00, 0x00, 0x00
							  
                                    yada yada yada....deleted code to minimize this message...
								"rom-revision",
								Buffer (0x0F)
								{
									"70.16.25.00.25"
								},
								"hda-gfx",
								Buffer (0x0A)
								{
									"onboard-1"
								}
							}, Local0)
						DTGP (Arg0, Arg1, Arg2, Arg3, RefOf (Local0))
						Return (Local0)
					}

The above is yours. What I had to do was to return that section to it's vanilla state; that's right I ripped all that code OUT. If you have a backup of the original DSDT, remove what you have and replace it with the original code. I know, it sounds counter-productive and besides you will be making a copy and experimenting on it instead, right? Once I removed all that code and replaced it with the original, make sure you have removed all enablers for graphics and try booting it up. Mine is working flawlessly.

Hold the phone. My 8800GT works in 10.8 flawlessly. OP, which brand 8800GT do you own?

-Stell


He's ALIVE! Did you ever get that MSI Big Bang X-Power 100%? Back to the original topic, for those following this thread, my 8800GT 512's are the EVGA brand.

I saw in other thread, that s´they remove other graphic related kext, except NV, perhaps that is a way to try....


PS, this IS for a 8800GT, right? Your signature says you have a completely different graphics card than what we are discussing.

#45
Peter_sm

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I going to try that,

I found a old DSDT i have saved,

This only show this.....

evice (PEGP)
			    {
				    Name (_ADR, 0xFFFF)
				    Name (_PRW, Package (0x02)
				    {
					    0x09,
					    0x04
				    })
			    }


#46
stellarola

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EVGA and I believe I flashed it with the Mac Pro's 8800GT bios some years ago. I have an XFX Alpha Dog Edition as well that I haven't tried yet. It may be possible to fix this issue by loading my EVGA's nvidia rom from Chameleon. I'll let you know when I extract the bios, etc.

EDIT: Grab Nvidia 8800GT roms from the first post on this thread: http://www.insanelym...dpost&p=1053726

It's the mediafire link.

Try to load either one of those roms using Chameleon, and remember to use stock kexts.


Anyone try this yet?

#47
3square

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I have a 8800 gt 512 mb card like some of you guys. The weird problem I'm having is getting the other card to work with it. 8500 gt 256 mb

My set up is 4 monitors with 2 cards. In lion I've been using Efi injection which works flawlessly. But on ML three monitors would work fine, the 4th is a black screen. BUT I can see and move my mouse cursor over the black screen, but nothing else is shown.

However when I boot into the installer all four screens works as it should.

#48
peanutman314

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I have a 8800 gt 512 mb card like some of you guys. The weird problem I'm having is getting the other card to work with it. 8500 gt 256 mb

My set up is 4 monitors with 2 cards. In lion I've been using Efi injection which works flawlessly. But on ML three monitors would work fine, the 4th is a black screen. BUT I can see and move my mouse cursor over the black screen, but nothing else is shown.

However when I boot into the installer all four screens works as it should.


I have the same problem. Dual 8800GT 512mb, worked fine up to Lion with EFI strings or GraphicsEnabler. One of my monitors should be in portrait mode. Most of the time all 4 monitors work in ML, if they are in landscape mode, but as soon as I change the vertical one into "90° rotation" it goes black, but with the mouse visible like you described. Also, sometimes at random he makes one screen black at boot (rarely), but for some weird reason it is not always the same one that goes black. I tried replacing the drivers with the NV* kexts from my last 10.7 install, but that only resulted in a KP. Please let me know if you find a fix.

#49
iFIRE

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've had the same problem with my 8800GT. My solutions was: just put the "NVDANV50Hal.kext" back from DP4.

Make a backup first.

Here it is: NVDANV50Hal_DP4.kext.zip

You can use the same activation method which you used for Lion eg. GraphicsEnabler, NVinject etc.


#50
3square

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've had the same problem with my 8800GT. My solutions was: just put the "NVDANV50Hal.kext" back from DP4.
Make a backup first.
Here it is: NVDANV50Hal_DP4.kext.zip
You can use the same activation method which you used for Lion eg. GraphicsEnabler, NVinject etc.


tried it just now. no dice. still the same problem. it did reset all my wallpaper to the ML default. so i guess something took affect, but wasn't it.

i think i can deal with having all monitor the same orientation. as long as it works right?

#51
EraseR72

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Sucess Leadtek Nvidia 8800GT on AMD X2 6000+ work on Mountain Lion 10.8.2  :thumbsup_anim:

Only need to change 5 Kexts on IAtkos ML2  (Working Mountain Lion Graphics Kexts) ! Thank you!

 

But QE and CI dont work, only resolution and name and memory info. How to fix this? :blush: 

In Snow leopar this card works great!



#52
René_

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Maybe wait for the 10.8.5 update. My 8800GT works out of the box again with this update :)

Same for Mavericks.

 

But with an AMD kernel it could be different.



#53
flkflorin

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Hi guys i have a problem with changing my resolution of my asus 8800GT , no mater what i try it not let me to use 1080p resolution .

I use the Working Mountain Lion Graphics Kexts and still not let me to have another resolution other then 1280x1024 and its works like i not have drivers...

 

I have mountain lion 10.8.5 .







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